The enactment of statewide laws allowing for the limited use of cannabis therapeutically is associated with reduced instances of suicide, according to a discussion paper published recently by the Institute for the Study of Labor in Bonn, Germany.

Researchers at Montana State University, the University of Colorado, and San Diego State University assessed rates of suicide in the years before and after the passage of statewide medical marijuana laws.

Authors found, “The total suicide rate falls smoothly during the pre-legalization period in both MML (medical marijuana law) and non-MML states. However, beginning in year zero, the trends diverge: the suicide rate in MML states continues to fall, while the suicide rate in states that never legalized medical marijuana begins to climb gradually.”

They reported that this downward trend in suicides in states post-legalization was especially pronounced in males. “Our results suggest that the passage of a medical marijuana law is associated with an almost 5 percent reduction in the total suicide rate, an 11 percent reduction in the suicide rate of 20- through 29-year-old males, and a 9 percent reduction in the suicide rate of 30- through 39-year-old males,” they determined.